533540261 has 4 divisors (see below), whose sum is σ = 534405612. Its totient is φ = 532674912.

The previous prime is 533540237. The next prime is 533540303. The reversal of 533540261 is 162045335.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35402500 + 498137761 = 5950^2 + 22319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-533540261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (533540561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431750 + ... + 432983.

It is an arithmetic number, because the mean of its divisors is an integer number (133601403).

Almost surely, 2^533540261 is an apocalyptic number.

It is an amenable number.

533540261 is a deficient number, since it is larger than the sum of its proper divisors (865351).

533540261 is an equidigital number, since it uses as much as digits as its factorization.

533540261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865350.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 533540261 is about 23098.4904485120. The cubic root of 533540261 is about 811.0651338374.

Adding to 533540261 its reverse (162045335), we get a palindrome (695585596).

The spelling of 533540261 in words is "five hundred thirty-three million, five hundred forty thousand, two hundred sixty-one".